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Parent Form Vanishes When I Tab To Option Group In The Child Form?!


I have a rather annoying and frustrating problem which I cannot find a solution for through searching the forum.

The situation is that I have a parent form with 1 unbound subform, the source of which is determined by the part number selected in the parent form (diffetrent parts have different fields of the source table displayed)

This all functions perfectly well in all but one case which is when the source of the subform is a form with an option group.

There is only 1 form like this, and the problem I have is that when tabbing through the fields, as soon as I tab into the option group the parent form disappears, and I am left with just the subform on screen! Clicking into the group is fine, just tabbing to it causes the problem, and if I remove the option group then tabbing through all the rest of the fields is fine...

I could powssibly change the option group for a set of option buttons and code them to function a bit like an option group, but this would mean changing the code for numerous reports etc. and I don't really want to do that if I can help it.




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But It's not working. It's giving an error saying "Compile Error: Variable not defined" and it highlights the word which I've mad RED in the code above. Now, I tried changing the exclamation for a fullstop, and I also tried writing "Form.Enquiry.FIRSTNAME" (and also with exclamation marks). None have given a working result.


I'll try and get some print screens too for more visibleness (new made-up word there) so you can see what I mean.


Blessings,
Si


Edit: here are a couple of print screens:

1. The Client tab/page of the main enquiry form:

http://i6.photobucket.com/albums/y218/Mr_Si/Enquiry.jpg


2. The Client Details form, which opens as a result of pressing the "New Client" button in the main enquiry form (shown in the background):

http://i6.photobucket.com/albums/y218/Mr_Si/Client.jpg


Argh! I forgot I couldn't post links to URLs

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